What is the greatest observed density?

In theory, the Planck density is the highest possible, about 10^98 g/cm or kg/m or lb/furlong or something like that as I recall. Has anything with a factor of 100 of that actually been verified by observation? Of course a Planck black hole would achieve it, but that is only theoretical. Big black holes and neutron stars are nowhere close. Particles might -- and are often treated as points -- but I don't think there is actual evidence of it.